Metallic linkage-type keying device

Abstract

The present invention discloses a metallic linkage-type keying device, which is installed to a casing, such as the casing of a camera, a mobile phone or a video camera. The metallic linkage-type keying device of the present invention comprises: a metallic linkage, having at least two joining portions; and at least one key, having at least two assembling portions. The key is installed to the metallic linkage via fixing two assembling portions to two joining portions. The metallic linkage-type keying device provided by the present invention can prevent ESD from attacking the interior of the casing via key gaps and has the advantages of compactness and low cost.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a linkage-type keying device, particularly to a metallic linkage-type keying device.[0003]2. Description of the Related Art[0004]ESD (Electro Static Discharge) is usually the source of the electrical overstress, which damages electronic elements or systems. ESD usually causes external damages in semiconductor elements and disables electronic products.[0005]ESD is likely to hit the interior of electronic products via penetrating through the assemblage gaps of electronic products. In a camera, the keys thereof are usually the gap-forming locations. The conventional keying device is often a one-piece design having a plastic linkage and plastic keys. In order to prevent the attack of ESD that penetrates through the gaps around keys, metallic plates are disposed in the perimeter of keys to guide ESD to the ground lest ESD attack the interior of electronic products. Refer to FIG. 1(a) and FIG....

AI Technical Summary

Benefits of technology

[0007]Another objective of the present invention is to provide a metallic linkage-type keying device, which can prevent ESD from penetrating through key gaps and entering into the casing of an electronic device.

[0008]Further another objective of the present invention is to provide a metallic linkage-type keying device, which has the advantages of compactness and low cost.

Problems solved by technology

ESD usually causes external damages in semiconductor elements and disables electronic products.

In addition to the plastic linkage 6, which is thicker originally, the installation of the metallic plates 4 makes the conventional keying device 2 occupy more space; thus, not only the camera needs a larger volume, but also the keys 10 become larger and have higher mold and material costs.

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